Closure devices including incremental release mechanisms and methods therefor

ABSTRACT

According to an embodiment, a device for tightening an article includes a housing, a spool rotatably positioned within the housing, a knob operably coupled with the spool to cause the spool to rotate within the housing, and a stop mechanism. The device is configured so that incremental rotation of the knob in a first direction causes a corresponding incremental rotation of the spool within the housing that incrementally tensions a tension member and thereby tightens the article. The device is also configured so that incremental rotation of the knob in a second direction causes a corresponding incremental rotation of the spool that incrementally loosens the tension member&#39;s tension. The stop mechanism is configured to prevent rotation of the spool in the second direction when the tension member&#39;s tension achieves or falls below a tension threshold.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application is a continuation-in-part of U.S. patent applicationSer. No. 14/328,521, filed Jul. 10, 2014, entitled “Closure DevicesIncluding Incremental Release Mechanisms and Methods Therefor,” whichclaims priority to U.S. Patent Application No. 61/844,788, filed Jul.10, 2013, entitled “Incremental Releasing Devices and Methods forApparel Closure Devices,” and to U.S. Patent Application No. 61/869,377,filed Aug. 23, 2013, entitled “Incremental Releasing Devices and Methodsfor Apparel Closure Devices.” This application is also acontinuation-in-part of U.S. patent application Ser. No. 14/198,419,filed Mar. 5, 2014, entitled “Systems, Methods, and Devices forAutomatic Closure of Medical Devices,” which claims priority to U.S.Patent Application No. 61/772,935, filed Mar. 5, 2013, entitled“Systems, Methods, and Devices for Automatic Closure of MedicalDevices.” The entire disclosures of all aforementioned applications arehereby incorporated by reference, for all purposes, as if fully setforth herein.

BACKGROUND OF THE INVENTION

The present invention is related to closure devices for variousarticles, such as braces, medical devices, shoes, clothing, apparel, andthe like. Such articles typically include closure devices that allow thearticle to be placed and closed about a body part. The closure devicesare typically used to maintain or secure the article to the body part.For example, shoes are typically placed over an individual's foot andlace is tensioned and tied to close the shoe about the foot and securethe shoe to the foot. Conventional closure devices have been modified inan effort to increase the fit and/or comfort of the article about thebody part. For example, shoe lacing configurations and/or patterns havebeen modified in an attempt to increase the fit and/or comfort ofwearing shoes. Conventional closure devices have also been modified inan effort to decrease the time in which an article may be closed andsecured about the body part. These modifications have resulted in theuse of various pull cords, straps, and tensioning devices that enablethe article to be quickly closed and secured to the foot.

BRIEF SUMMARY OF THE INVENTION

The embodiments described herein provide closure systems that may beused to increase and loosen a tension member's tension and therebyadjust the tightness of an article. The closure systems may be used toadjust the tightness of a variety of articles, such as shoes, braces,apparel, sporting equipment, and the like. In some embodiments, theclosure system may have a component or mechanism that functions to limitthe amount of loosening of the tension member. The component ormechanism may limit the amount of loosening of the tension member byrestricting or preventing the transfer of input rotational forces to oneor more internal system components. In some embodiments, the componentor mechanism may transition between an engaged state and a disengagedstate to either enable or disable the transfer of the input rotationalforces to the internal system components.

According to one aspect, a reel for use with a lacing system fortightening an article includes a housing having an interior region and aspool positioned within the interior region of the housing and rotatablerelative thereto. The spool includes an annular channel formed therein.A knob that is rotatable relative to the housing is operably coupledwith the spool to cause the spool to rotate within the interior regionof the housing. Incremental rotation of the knob in a first directionrelative to the housing causes a corresponding incremental rotation ofthe spool within the interior region of the housing that incrementallygathers a tension member in the annular channel formed in the spool.Similarly, incremental rotation of the knob in a second directionrelative to the housing causes a corresponding incremental rotation ofthe spool that incrementally releases the tension member from theannular channel formed in the spool. The reel also includes a stopmechanism that is configured to prevent rotation of the spool in thesecond direction when a tension of the lace achieves or decreases beyonda tension threshold.

According to another aspect, a closure system for tightening an articleincludes a housing having an interior region, a tensioning mechanismthat is configured to tension a tension member and thereby tighten thearticle, a first mechanism that is transitionable between an engagedstate and a disengaged state, and a second mechanism that istransitionable between an engaged state and a disengaged state. When inthe engaged state, the first mechanism allows the tension member to beincrementally tensioned via a first operation of the tensioningmechanism while preventing loosening of the tension member's tension.When in the disengaged state, the first mechanism allow the tensionmember's tension to be incrementally loosened via a second operation ofthe tensioning mechanism. When in the disengaged state, the secondmechanism allows the tension member's tension to be incrementallytensioned via the first operation of the tensioning mechanism and to beincrementally loosened via the second operation of the tensioningmechanism. When in the engaged state, the second mechanism prevents thetension member's tension from being incrementally loosened via thesecond operation of the tensioning mechanism. The second mechanism istransitionable from the disengaged state to the engaged state when thetension member's tension achieves or decreases beyond a tensionthreshold.

According to another aspect, a method for configuring a reel for usewith a lacing system for tightening an article includes providing ahousing having an interior region and positioning a spool within theinterior region of the housing so that the spool is rotatable relativeto the housing. The spool may have an annular channel formed therein.The method also includes operably coupling a knob with the spool tocause the spool to rotate within the interior region of the housing uponrotation of the knob, the knob being rotatable relative to the housing.Incremental rotation of the knob in a first direction causes acorresponding incremental rotation of the spool within the interiorregion of the housing that winds or gathers a tension member about thespool (e.g., incrementally gathers the tension member in an annularchannel formed in the spool) and incremental rotation of the knob in asecond direction causes a corresponding incremental rotation of thespool that incrementally releases the tension member from about thespool (e.g., incrementally releases the tension member from the annularchannel formed in the spool). The method further includes configuringthe reel with a stop mechanism that is configured to prevent rotation ofthe spool in the second direction when a tension of the lace achieves ordecreases beyond a tension threshold.

According to another aspect, a closure system for tightening an articleincludes a housing having an interior region, a spool positioned withinthe interior region and rotatable relative thereto, a tension membercoupled with the spool, a tensioning mechanism having a knob, anincremental release component operationally coupled with the spool, anda full release mechanism that is transitionable between an engaged stateand a disengaged state. The tensioning mechanism is configured to effecttensioning of the tension member by winding the tension member aroundthe spool upon rotation of the knob. The incremental release componentincludes one or more axially oriented teeth that engage withcorresponding teeth of a toothed disc. The incremental release componentis configured to effect incremental tensioning of the tension memberupon rotation of the knob in a first direction by engaging the axiallyoriented teeth and to effect incremental loosening of the tensionmember's tension upon rotation of the knob in a second direction bydisengaging the axially oriented teeth. Engagement of the axiallyoriented teeth allows the spool to rotate in a first direction whilepreventing rotation of the spool in a second direction and disengagementof the axially oriented teeth allows the spool to rotate in a seconddirection by an incremental amount. When the full release mechanism isin the engaged state, the tension member's tension may be incrementallytensioned or loosened upon said rotation of the knob and when the fullrelease mechanism is in the disengaged state, the tension member'stension is automatically loosened.

According to another aspect, a closure system for tightening an articleincludes a housing having an interior region and a spool positionedwithin the interior region and rotatable relative thereto. A tensionmember is coupled with the spool. The closure system also includes atensioning mechanism that is configured to rotate the spool within theinterior region and thereby tension the tension member to tighten thearticle. The closure system further includes a tension release mechanismthat is configured to allow the spool to be rotated in a first directionvia a first operation of the tensioning mechanism to incrementallytension the tension member and to allow the spool to be rotated in asecond direction via a second operation of the tensioning mechanism suchthat the tension member's tension is loosened in substantiallyinfinitely small increments. In some embodiments, the closure systemadditionally includes a full release mechanism that is transitionablebetween an engaged state and a disengaged state. When in the engagedstate, the full release mechanism allows the tension member's tension tobe tensioned and loosened via said operation of the tensioningmechanism, and when in the disengaged state, the full release mechanismallows the tension member's tension to be automatically loosened.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is described in conjunction with the appendedfigures:

FIGS. 1-3 illustrate an embodiment of a reel based closure system andvarious components that may be included within the reel based closuresystem.

FIGS. 4A-B illustrate exploded perspective views of an embodiment of areel assembly or reel based closure system that may be used toincrementally tighten or loosen a tension member.

FIGS. 4C-D illustrate cross-sectional perspective views of the housingand spool of the reel assembly of FIGS. 4A-B.

FIGS. 4E-G illustrate cross-sectional views of the assembled componentsof the reel assembly of FIGS. 4A-B.

FIG. 5 illustrates an exploded cross-sectional perspective view ofanother embodiment of a reel assembly that may be used to incrementallytighten or loosen a tension member.

FIGS. 6A-B illustrate exploded perspective views of an embodiment of areel assembly or reel based closure device that is capable of providingessentially infinite tension member loosening increments or amounts.

FIGS. 6C-E illustrate exploded perspective views of a tension releasemechanism of the reel assembly of FIGS. 6A-B.

FIG. 6F illustrates a perspective view of the assembled components ofthe tension release mechanism of FIGS. 6C-E.

FIG. 6G illustrates a cross-sectional perspective view of the assembledcomponents of the reel assembly of FIGS. 6A-B.

FIGS. 7A-B illustrate another embodiment of a reel assembly that may beused to incrementally loosen a tension member.

FIG. 8 illustrates another embodiment of a reel assembly that may beused to incrementally loosen a tension member.

FIGS. 9A-C illustrate an embodiment of a reel assembly that isconfigured so that axially pressing a knob or button causes a tensionmember's tension to be incrementally loosened.

FIGS. 9D-H illustrate an embodiment of a reel assembly that isconfigured so that radially pressing a button causes a tension member'stension to be incrementally loosened.

FIGS. 9I-K illustrate an embodiment of a reel assembly that isconfigured so that axially pressing a knob or button causes a pawl discto displace axially within the reel assembly's housing to incrementallyloosen a tension member's tension.

FIGS. 10A-C illustrate an embodiment of a tension member guide that ismoveable into and out of a path of a tension member to respectivelyincrease or loosen the tension member's tension.

FIGS. 10D-E illustrate another embodiment of a tension member guide thatis adjustable to alter the tension member's path to increase or loosenthe tension member's tension.

FIGS. 11A-D illustrate an embodiment of a tension member guide having abutton system that enables the tension member guide to move along atrack to loosen the tension member's tension.

FIGS. 11E-G illustrate an embodiment of a tension member guide having alever or arm that is operable to move the tension member guide along atrack to loosen the tension member's tension.

FIGS. 11H-I illustrate an embodiment of a tension member guide having abutton system that is operable to move the tension member guide along atrack to loosen the tension member's tension.

FIGS. 12A-C illustrate an embodiment of a mechanism that may be usedwith a tensioning device to hold or maintain an article in an openconfiguration.

In the appended figures, similar components and/or features may have thesame numerical reference label. Further, various components of the sametype may be distinguished by following the reference label by a letterthat distinguishes among the similar components and/or features. If onlythe first numerical reference label is used in the specification, thedescription is applicable to any one of the similar components and/orfeatures having the same first numerical reference label irrespective ofthe letter suffix.

DETAILED DESCRIPTION OF THE INVENTION

Embodiments described herein provide various mechanisms that may be usedto “incrementally” loosen or release tension on a tension member that istensioned to close and/or tighten a variety of items, such as medicalbraces (back braces, knee braces, and the like), items of clothing(hats, gloves, and the like), sports apparel (boots, snowboard boots,ski boots, and the like), footwear (running shoes, cycling shoes,athletic shoes, outdoor shoes, and the like) and various other items.Such articles are commonly tensioned with a lace or cord that ispositioned and/or guided about the article via one or more guides. Forease in describing the embodiments herein, the tension member will begenerally referred to as a lace, although it should be realized thatvirtually any component that is capable of being tensioned may functionas the tension member. As described herein, the guides that are used toposition and/or guide the lace about the article may have a lumen,channel, or other recess within which the lace is positioned.

As used herein incrementally releasing lace tension means that thetension of or applied to the lace is loosened or otherwise adjustedgradually and often by regular degrees, increments, amounts, or steps.For example, in some embodiments the lace tension may be loosened orotherwise adjusted by discrete steps or amounts. In other embodiments,the lace tension may be loosed by infinitely small increments, steps, oramounts. The description of loosening the lace by infinitely smallincrements or amounts means that the loosening does not necessarilyinvolve and/or is not achieved in discrete segments or steps. Rather,the lace is capable of being loosened by very minor, and sometimesnearly indistinguishable or insubstantial, amounts. In such embodiments,the lace is also capable of being loosened by a significant orsubstantial amount. The ability to both loosen the lace by infinitelysmall amounts or substantial amounts allows the user to quickly achievea lace tension that is comfortable and/or preferred. It also allows theuser to tension the lace by essentially amount rather than by discreteincrements or segments.

A specific application of the incremental lace loosening conceptsdescribed herein involves reel based closure devices and systems, wherea knob or other component is rotated, or otherwise operated, to wind thelace around a spool and to unwind lace therefrom. Many conventional reelbased closure devices and systems are not capable of incrementallyreleasing lace tension. Rather, these conventional systems often fullyloosen or release lace tension upon operation of a loosening mechanism.Stated differently, these conventional systems often loosen or releaselace tension in a single step, or a few steps, and the lace tension isreduced to at or near essentially zero or minimal tension.

The incremental lace loosening embodiments described herein function ina manner that is opposite to these conventional loosening technologiesin that the embodiments allow the tension on the lace to be loosened oradjusted by relatively small amounts or degrees without fully releasingor loosening the tension on the lace. This incremental lace looseningcapability may be beneficial when relative small or minor adjustments oflace tension are desired. For example, a user may wish to release orloosen tension on the lace of a running or cycling shoe when the user isnot actively using the shoe (i.e., running or cycling) so as to providea more comfortable fit of the shoe. In such instances, the user mayeasily employ the incremental lace loosening embodiments describedherein to slightly loosen the lace tension as desired without fullyloosening the lace. Conventional closure systems that require fullyloosening the lace would require the user to fully loosen the lace andthen retighten the lace using the closure system until the desired lacetension and fit of the shoe is achieved. In such instances, the user mayaccidentally “overshoot” or over-tension the lace, which would requirefully loosening and re-tensioning of the lace, such as by pulling openthe device to loosen the lace and then re-tensioning the lace.Similarly, a patient may desire to adjust the lace tension of a brace bysome small amount to provide a more comfortable fit and/or to accountfor swelling of a limb. The embodiments described herein allow the lacetension to be loosened or adjusted without requiring the lace to befully loosened.

In some embodiments it may be desired to limit the amount of looseningthat may be performed. For example, in embodiments that involve a reelbased closure system, it may be desired to restrict or prevent looseningof the lace after the lace achieves or decreases beyond a tensionthreshold. Preventing further lace tension loosening may prevent apatient from removing a brace or medical device that is fit about a limband/or prevent damage to the lace and/or internal components of the reelbased closure system. For example, if the lace is fully loosened so thatthe tension is essentially zero, further rotation of the knob componentin a loosening direction may cause the lace to “backwind” around thesystem's spool. Stated differently, too much rotation of the knobcomponent in the loosening direction will cause the lace to be woundaround the spool in a direction opposite that for which it was designed.Back winding of the lace may cause the lace to kink, tangle, twist,loop, and/or cause other problems that may compromise the integrity ofthe lace and/or closure system. Back winding may also damage otherinternal components of the closure system. The embodiments describedherein restrict or prevent such undesired lace tension loosening. Insome embodiments, the closure device may include one or more componentsor mechanisms that automatically restrict or prevent lace tensionloosening after the lace achieves or decreases below a tensionthreshold. The components or mechanisms may automatically transitionfrom one state to another to allow lace tension loosening when the lacetension is above the tension threshold and to prevent further looseningwhen the tension falls below the tension threshold.

Some embodiments also allow the lace to be fully loosened, such as bypulling axially upward on a knob component of the device, or by rotatingthe knob component in a loosening direction (e.g., ¼ turn), to loosenthe lace and subsequently pushing axially downward on the knobcomponent, or rotating the knob component in a tightening direction, toreengage the device and tension the lace. Accordingly, some embodimentsallow both an incremental and full lace loosening approach. The fulllace loosening embodiments allow the lace tension to be quickly loosenedor released, which may be important when speed or time is important,such as sporting events that require a relatively quick change offootwear. Further, the embodiments that provide both incremental andfull lace loosening capabilities provide the user with a uniquecombination of lace loosening speed and convenience in fine or minorlace tension adjustment.

A specific embodiment in which the incremental lace loosening mechanismsor devices may be used involves shoes. For ease in describing theembodiments herein, the disclosure will mainly describe the incrementallace loosening mechanisms/device being used for shoes, although itshould be realized that the closure devices may be used for the variousother items.

Referring now to FIGS. 1-3, illustrated is an embodiment of a reel basedclosure system. FIGS. 1-3 provide a general overview of the variouscomponents that may be included within a reel based closure system ordevice. The other embodiments described herein may include one or moreof the components described and illustrated in FIGS. 1-3, but do notnecessarily need to contain said components. FIG. 1 schematicallyillustrates an example embodiment of a reel assembly 100 for use with aclosure device or system. The reel assembly 100 includes a housing 102,and a spool 104 that rotates relative to housing 102 to adjust tensionon a lace 106. The spool 104 can be coupled to a first engagement member108 and the housing 102 can be coupled to a second engagement member110. The first and second engagement members 108, 110 can interface witheach other to limit or otherwise influence the rotation of the spool 104relative to the housing 102. For example, the engagement members 108,110 can allow the spool 104 to rotate substantially unimpeded in a firstdirection so as to gather lace 106 into the reel assembly 100, and theengagement members 108, 110, when engaged with each other, can preventthe spool 104 from rotating in a second direction that releases lace 106from the reel assembly 100. In some embodiments, the first engagementmember 108 can include one or more pawls, and the second engagementmember 110 can include a plurality of teeth.

The reel assembly 100 can include a knob 112 that can be configured tocontrol rotation of the spool 104. For example, rotating the knob 112 ina first direction can cause the spool 104 to rotate in the firstdirection, thereby gathering lace into the reel assembly 100. Engagementmembers 108, 110 can incrementally lock the spool 104 against rotationin the second direction. In some embodiments, rotating the knob 112 in asecond direction can cause the engagement members 108, 110 to disengagefrom each other to allow the spool 104 to rotate in the seconddirection, thereby releasing lace 106 from the reel assembly 100. Insome embodiments, the engagement members 108, 110 can be configured toreengage after the spool 104 has rotated a predetermined amount in thesecond direction, thereby locking the spool 104 against furtherloosening until the knob 112 is again rotated in the second direction.In this manner, reel assembly 100 can provide for incremental release ofthe lace 106 from the reel assembly 100. In some embodiments, the reel112 can include one or more drive members 114, which can be integral to,or coupled to, the knob 112, and which can interface with the spool 104,the first engagement member 108, and/or the second engagement member 110to control rotation of the spool 104. In some embodiments, a protectionelement 116 can be provided to increase the durability of one or both ofthe engagement members 108, 110. For example, the protection element 116can be a metal (or other suitably durable) cap that is placed on theportion of a pawl that interfaces with the teeth.

In some embodiments, the reel assembly 100 can include a debris diverterthat can be configured to move debris away from the interface betweenthe engagement members 108, 110. In some embodiments, the reel assembly100 can include a lace retaining element 120 that can be configured toretain the lace 106 away from the walls of the housing 102 to preventthe lace 106 from backing up inside the reel assembly 100. In someembodiments, if the lace 106 is loosened when no tension is placed onthe lace 106, the lace 106 can tend to unwind inside the reel assembly100 and move radially outward away from the rotational axis of the spool104. If the lace 106 moves radially outward and contacts the inner wallof the housing 102, friction between the housing 102 and the lace 106can cause the lace to double back on itself inside the reel assembly100. In some embodiments, the lace retaining element 120 can beconfigured to hold the lace 106 off of the housing 102 wall as the lace106 is loosened, thereby facilitating the exiting of the lace 106through hole 122 during loosening. In some embodiments, the reelassembly 100 can include a lace termination pocket 118 that provides atermination point for the lace.

In some embodiments, the reel assembly 100 can include a rotationlimiter 124. The rotation limiter can be configured to prevent the spool104 from being rotated too far in the first direction and/or in thesecond direction. If excessive lace 106 is drawn into the reel assembly100, the lace 106 can jam the reel assembly 100. If the spool 104 isrotated in the second direction when the lace 106 is fully loosened, thereel assembly 100 can start to start to gather lace 106 in the wrongdirection. The rotation limiter can be, for example, a stop cord that iscoupled to the housing 102 and to the spool 104 such that rotation ofthe spool 104 takes up slack in the stop cord (e.g., by winding the stopcord around a channel on the spool 104 or around a pin or otherstructure of the housing 102). When the stop cord becomes tight, thespool 104 is prevented from further rotation.

The reel assembly 100 can include a mounting member 126. In someembodiments, the mounting member 126 can be a flange that is configuredto be sewn, adhered, or otherwise coupled to an article (e.g., a shoe).In some embodiments, the mounting member 126 can be configured toremovably attach to a base member (not shown) on the article so that thereel assembly 100 can be removed from the article, such as for repair orreplacement of the reel assembly 100. The mounting member 126 caninclude a hole 128 that receives a fastener (e.g., a bolt) that securesthe mounting member 126 to the base member on the article.

Although the embodiments described herein may be described as havingvarious features integrated into a single reel assembly (e.g., theincremental release, protection element 116, debris diverter, laceretaining element 120, rotation limiter 124, and removable mountingmember 126 of the reel assembly 100 of FIG. 1), other embodiments can bemade to use only one of the described features, or any combination ofthe described features. Also, additional features can be incorporatedinto the reels described herein in addition to the features specificallydescribed.

FIG. 2 is a perspective view of an example embodiment of a closuredevice or system 200. The closure system 200 can include a reel assembly202, at least one lace guide 204, and a lace 206 that extends betweenthe reel 202 and the lace guide 204. The reel assembly 202 can beconfigured to gather lace 206 to draw the lace guide 204 closer to thereel assembly 202 and tighten the closure system 200, and the reelassembly 202 can be configured to release lace 206 to loosen the closuresystem 200. Although only one lace guide 204 is shown in FIG. 2, anysuitable number of lace guides 204 (e.g., 2, 3, 5, etc.) can be used.

In some embodiments, the lace 206 can be a highly lubricious cable orfiber having a high modulus of elasticity and a high tensile strength.In some embodiments, the cable can have multiple strands of materialwoven together. While any suitable lace can be used, some embodimentscan utilize a lace formed from extended chain, high modulus polyethylenefibers. In some embodiments, SPECTRA™ fiber (manufactured by Honeywellof Morris Township, N.J.) can be used. In some embodiments, the lace canbe formed from a molded monofilament polymer. The lace or cable can havea diameter of at least about 0.02 inches and/or no more than about 0.04inches, or at least about 0.025 inches and/or nor more than about 0.035inches, although diameters outside these ranges can also be used. Insome embodiments, the lace can have a core/sheath configuration where afirst material is used for the lace core and a second material is usedfor a sheath that is positioned over the core. For example, SPECTRA™ orDyneema® may be used for the lace core and polyester or another materialmay be used for the sheath.

The lace can be made of high modulus fibers that advantageously have ahigh strength to weight ratio, are cut resistant, and/or have very lowelasticity. The lace can be formed of tightly woven fibers to provideadded stiffness to the lace. In some embodiments, the lace can haveenough column strength that the lace can be easily threaded through thelace guides, and into the reel and spool, or through the guides so as toform a loop of lace that can be easily grasped by a user. In someembodiments, the lace can have enough column strength that the lace canbe pushed out of the reel without doubling back on itself, as discussedelsewhere herein.

FIG. 3 is a perspective view of the closure system 200 incorporated intoa sports shoe 208. The closure system 200 can also be incorporated intoany other suitable articles including, but not limited to, cyclingshoes, boots, other footwear, belts, hats, gloves, braces, helmets, bootbindings, backpacks, or other suitable wearable articles, or any otheritem in which two portions are to be selectively drawn together andloosened. The shoe 208 can have a first side 210 a and a second side 210b, and the closure system 200 can extend between the sides 210 a, 210 b.Thus, when the lace 206 of the closure system 200 is tightened, thesides 210 a, 210 b of the shoe 208 are drawn together, and when the lace206 is loosened, the sides 210 a, 210 b of the shoe 208 are allowed tomove apart. In the illustrated embodiment, the shoe 208 has a secondreel 202′ mounted to the heel portion of the shoe 208. The second reel202′ can be similar to, or the same as, the first reel 202. The secondlace 206′ can pass along a channel through the shoe 208 to the laceguides 204′. The second reel 202′ can be configured to tighten a secondlace 206′ on an upper zone of the shoe 208, and the reel 202 can tightena lower zone of the shoe 208. Many variations are possible. For example,a single reel can be used to adjust a single lace that extends throughthe full set of lace guides 204, 204′, or more than two reels can beused. A reel assembly can be mounted onto tongue of the shoe 208, or onthe side or heel (as shown in FIG. 3), or on any other suitable portionof the article.

Referring now to FIGS. 4A and 4B, illustrated is an exploded perspectivetop view and an exploded cross-sectional perspective view, respectively,of a reel assembly 402. Reel assembly 402 includes a knob 470 that maybe rotated by a user to wind lace (not shown) around a spool 410 of reelassembly 402. As knob 470 is rotated, drive members (not shown) of knob470 rotate disc 440, which in turn rotates tension control disc 420.Tension control disc 420 is coupled with disc 440 via a pair of lippedcomponents 424 that axially extend from a top surface of disc 420 andengage with corresponding apertures 442 of disc 440. The components 424may snap into the apertures 442 of disc 440 to couple the two discs, 440and 420, together with pawl disc 430 sandwich or positioned therebetween. Engagement of the discs, 440 and 420, via the components 424and apertures 442 allows rotational forces input into knob 470 to betransferred from disc 440 to tension control disc 420. The disc 440 andtension control disc 420 are rotatable relative to the pawl disc 430that is sandwiched between the two discs. This configuration allowsdrive components 422 of the tension control disc 420 to rotate relativeto pawl disc 430 and thereby engage with components of pawl disc 430 totransfer tightening and loosening rotational forces to pawl disc 430.

Tension control disc 420 includes a plurality of drive components 422that are used to drive and rotate pawl disc 430 in both a firstdirection and a second direction to tension and loosen the lace asdescribed below. As shown in FIG. 4A, in one embodiment the tensioncontrol disc 420 may include four drive components 422 (i.e., two formedat the base of the components 424 and two independent of the components424). The number of drive components corresponds with the number of pawlteeth 432 used and may be varied as desired between 1 and any number.

As briefly mentioned above, drive components 422 may drive, or otherwisecause rotation of, pawl disc 430 as the tension control disc 420 isrotated via disc 440 and knob 470. To drive pawl disc 430, the drivecomponents 422 may be positioned within a space 436 between pawl teeth432 and a drive member 434, which extends radially outward from acentral core or portion of pawl disc 430. As knob 470 is rotated in afirst or tightening direction (e.g., clockwise), drive components 422contact the drive members 434 and transfer rotational forces fromtension control disc 420 to pawl disc 430, which causes pawl disc 430 torotate in the first or tightening direction. Rotation of the pawl disc430 in the first or tightening direction causes the pawl teeth 432 todeflect radially inward and outward relative to housing teeth 406 in aratchet like fashion. The pawl teeth 432 may be elongated members thatare cantileverly mounted to, or otherwise supported by, drive members434 and/or pawl disc 430. The cantilevered configuration of pawl teeth432 allows the pawl teeth 432 to deflect inwardly and outwardly relativeto housing teeth 406 in the ratchet like fashion.

The interaction between pawl teeth 432 and housing teeth 406 allows thepawl disc 430 to be rotated in the first or tightening direction whilepreventing counter rotation (e.g., counterclockwise rotation) of thepawl disc 430. The engagement of the pawl teeth 432 and housing teeth406 also prevents rotation of other components of the reel assembly 402,such as tension control disc 420 and spool 410. For example, theengagement of the pawl teeth 432 and housing teeth 406 allows the spool410 to be rotated in the first or tightening direction so as to windlace (not shown) around a central channel 416 of spool 410, whichtensions the lace. The interaction between pawl teeth 432 and housingteeth 406 also prevents counter rotation of the spool 410 to preventunwinding of the lace from the central channel 416 of spool 410, andtherefore prevents loosening of the lace. The rotation of spool 410 isachieved via an interaction between teeth 412 and corresponding teeth426 of tension control disc 420. The respective teeth, 412 and 426, ofspool 410 and tension control disc 420 extend axially from therespective components in opposite directions and are configured to matesuch that rotation of tension control disc 420 in the first ortightening direction causes rotation of spool 410 in the first ortightening direction. The interaction between teeth 412 and teeth 426also prevents counter rotation of spool 410, and therefore preventsunwanted loosening of the lace.

The tension control disc 420 also enables incremental loosening of thelace when the knob 470 is rotated in a second or loosening direction(e.g., counterclockwise), which is opposite the first or tighteningdirection. Specifically, incremental lace tension loosening is achievedvia drive components 422. Rotation of the knob 470 in the looseningdirection causes tension control disc 420 to rotate in the looseningdirection via disc 440 and the engagement of components 424 withapertures 442. As the tension control disc 420 rotates in the looseningdirection, drive components 422 move and rotate slightly within space436 into contact with the pawl teeth 432. A cammed, ramped, or slopedsurface of drive components 422 “sweeps” or pushes the pawl teeth 432out of engagement with the housing teeth 406. Stated differently, drivecomponents 422 disengage the pawl teeth 432 from the housing teeth 406,which allow the pawl disc 430 and spool 410 to rotate in the looseningdirection. The tension on the lace (not shown), in part, causes thespool 410 and tension control disc 420 (e.g., via teeth 412 and 426) torotate in the loosening direction, which causes the pawl disc 430 toalso rotate in the loosening direction via drive component 422. Rotationof the pawl disc 430 in the loosening direction causes the pawl teeth432 to snap into engagement in a ratchet like fashion with housing teeth406 that are adjacent the previously engaged housing teeth in theloosening direction. In this manner, rotation of the spool 410 in theloosening direction may be achieved in incremental or discrete steps,which allows the tension of the lace to be incrementally loosened orreleased.

In some embodiments, disc 440 may include protrusions on its bottomsurface that function to “sweep” or push the pawl teeth 432 out of thehousing teeth 406 as described above and/or drive rotation of pawl disc430.

In some embodiments, to fully loosen or release the tension on the lace,the knob 470 may be pulled axially upward relative to housing 404 inorder to disengage the pawl teeth 432 from the housing teeth 406 andthereby allow spool 410 to freely spin in the second or looseningdirection. To enable the knob 470 to be pulled axially upward anddisengage the pawl teeth 432 from housing teeth 406, a spring component454 is coupled with a central bushing 450. Pulling the knob 470 axiallyupward causes the spring component 454 to axially move from a firstannular groove or inclined face 457 of the bushing 450 to a secondannular inclined face 456 of the bushing 450. In moving from the firstannular inclined face 457 to the second annular inclined face 456, thespring component 454 deflects radially outward and inward. Whenpositioned in the second annular inclined face 456, the spring component454 holds or otherwise maintains the knob 470, disc 440, pawl disc 430,and tension control disc 420 in an axially raised position within thehousing 404 wherein the pawl teeth 432 are disengaged from housing teeth406. In the axially raised position, the teeth 426 of tension controldisc 420 may also be disengaged from the teeth 412 of spool 410. In thisconfiguration, spool 410 is able to spin or rotate freely in theloosening direction and thereby allow the lace tension to be fullyloosened or released. In other embodiments, to fully loosen or releasethe tension on the lace, a button, lever, or other release mechanism maybe pressed or operated.

The various components of reel assembly 402 may be coupled together viaa fastening mechanism 460 (e.g., a bolt or screw) which is coupled witha central post of housing 404. Housing 404 may also include one or morelace channels 407 within which the lace may be threaded to access thecentral channel 416 of spool 410. As described above, the reel assembly402 allows incremental releasing or loosening of lace tension as well asfull or essentially complete releasing/loosening of the lace tension.Additional features of other reel assemblies are provided in U.S. patentapplication Ser. No. 13/273,060, filed Oct. 13, 2011, titled “Reel-BasedLacing System”, the entire disclosure of which is incorporated herein byreference.

In many embodiments, it may be desirable to allow the spool 410 to berotated in the loosening direction only as long as a minimal amount oftension exists in the lace. Stated differently, it may be desirable toprevent rotation of the spool 410 in the loosening direction when thelace tension achieves or decreases beyond a tension threshold, such aszero lace tension. Preventing further rotation of the spool 410 when thelace tension is at or near the tension threshold may prevent backwinding of the lace and/or kinking or entangling of the lace withincentral channel 416 of spool 410. It may also prevent the lace frombeing “pushed” or forced out of the lace channels or ports 407.

To prevent rotation of the spool 410 in the loosening direction when thelace tension is at or near the tension threshold (e.g., zero lacetension), spool 410 includes teeth 414 that are positioned on andaxially extend from a bottom surface of the spool 410. The teeth 414interact with corresponding teeth 408 that are positioned on and axiallyextend from an inner bottom surface of housing 404. FIGS. 4C and 4Dillustrate the respective teeth, 414 and 408, of spool 410 and housing404 in greater detail. The teeth, 414 and 408, are configured to bedisengaged until the lace tension is at or near the tension threshold.Disengagement of the teeth, 414 and 408, allows the spool 410 to rotatein the tightening and loosening direction as described above to tensionand loosen the lace. After the teeth, 414 and 408, engage, furtherrotation of the spool 410 in the loosening direction is prevented orlimited. To allow engagement and disengagement of the teeth, 414 and408, the spool 410 is configured to move axially upward and downwardrelative to housing 404.

In some embodiments, disengagement of the teeth, 414 and 408, may befacilitated or achieved by providing a slight taper or slopedconfiguration on teeth 412 and teeth 426. The taper/slope of teeth 412and 426 may be oriented so that the spool 410 is forced or pulledaxially upward relative to housing 404 and into engagement with tensioncontrol disc 420 when the tension control disc 420 rotates in the firstor tightening direction and/or some amount of lace tension exists. Forexample, the taper/slope configuration of the teeth may cause teeth 412of spool 410 to slide axially upward relative to and into furtherengagement with the teeth 426 of tension control disc 420 as the tensioncontrol disc 420 rotates in the tightening direction and/or as the lacetension is increased.

The lace tension and sloped/tapered teeth configuration may maintain theteeth 412 and 426 in the engaged configuration as the tension controldisc 420 and spool 410 are rotated in the loosening direction. Forexample, as the tension control disc 420 rotates in the looseningdirection, the tension in the lace causes the spool 410 to rotate in theloosening direction, which maintains contact and engagement betweenteeth 412 and teeth 426 thereby keeping the spool 410 in the axiallyraised position with teeth 414 and 408 disengaged. The amount of forceor pressure exhibited between the teeth 412 of spool 410 and the teeth426 of tension control disc 420 corresponds to the tension in the laceat any given time. As such, as the lace tension is loosened and nearszero, the force or pressure between the teeth 412 and 426 also decreasesand nears zero, which allows the spool 410 to begin to move axiallydownward relative to tension control drive 420 and housing 404.

At some point, the spool 410 will move axially downward relative tohousing 404 so that the teeth 414 of spool 410 engage with the teeth 408of housing 404.

Frictional engagement of the teeth, 414 and 408, prevents or limitsfurther movement of spool 410 in the loosening direction. As the knob470 and tension control disc 420 are rotated in the loosening directionafter engagement of teeth 414 and 408, a rear surface of teeth 426 oftension control disc 420 will contact a rear surface of the teeth 412 ofspool 410. The rear surfaces of teeth 426 and 412 are sloped or rampedso that contact between the rear surfaces of the teeth, 426 and 412,presses or forces the spool 410 axially downward relative to housing404, which increases the frictional contact between teeth 414 and 408and prevents further rotation of spool 410 in the loosening direction.The sloped the ramped configurations of teeth 426 and 412 also allowsthe tension control disc 420 and teeth 426 to slide axially up and overthe teeth 412 and spool 410 as the tension control disc 420 is rotatesin the loosening direction. In this manner, the knob 470, tensioncontrol disc 420, and the other components of reel assembly 402 (e.g., apawl disc 430 and disc 440) may continue to be rotated in the looseningdirection without causing rotation of the spool 410. In someembodiments, the knob 470 and/or other components may move slightlyaxially upward and downward as the tension control disc 420 slidesaxially up and over the spool teeth 412. In other embodiments, the knob470 may be forced axially upward and into an open configuration when theknob 470 is rotated in the loosening direction after engagement of teeth414 and 408. For example, the central bushing 450 may engage and lock ormaintain the knob 470 in an axially upward and open configuration whenthe knob 470 is rotated in the loosening direction after engagement ofteeth 414 and 408. As described herein, in the open configuration, thespool 410 may be allowed to freely spin within the housing 404.

In some embodiments, the teeth, 414 and/or 408, may be replaced by otherfrictional components, such as a rubber type gasket or material,abrasive materials, tacky materials, and the like. Even when the spool410 is moved axially downward so that the teeth, 414 and 408, contactone another, the configuration of the teeth 426 of tension control disc420 and the teeth 412 of spool 410 is such that rotation of the tensioncontrol disc 420 in the tightening direction causes the teeth 426 and412 to contact one another and reengage. Stated differently, the teeth426 of disc 420 and the teeth 412 of spool 410 are configured in anaxially overlapping manner so that rotation of the knob 470 and tensioncontrol disc 420 causes the teeth 426 and 412 to contact one another aslong as the knob 470 and other reel assembly components are not in theaxially raised position relative to housing 404. As such, when the knob470 is once again rotated in the tightening direction, the teeth 426 oftension control disc 420 will once again engage the teeth 412 of spool410, which will cause the spool 410 to be forced or pulled axiallyupward and thereby disengage the teeth 414 and 408 of the spool 410 andhousing 404, respectively. In this manner, the reel assembly 402 may beoperated to re-tension the lace as previously described.

The embodiments described herein may be used to tension a variety oflaces and lace patterns. For example, in some embodiments, a single“active” lace may traverse across a shoe or other article and may betensioned by any of the incremental lace loosening closure devicesdescribed herein. The term single active lace means that a single laceis coupled with the closure device and tensioned thereby. Such lacesoften have a distal end that terminates on the shoe or article, or on ahousing or other component of the closure device, and a proximal endthat is coupled with the closure device (e.g., wound around a spoolcomponent) and tensioned by the closure device. In other embodiments, adual active lace may traverse the shoe or other article and may betensioned by an incremental lace loosening closure device. The term dualactive lace means that two or more laces are coupled with the closuredevice and tensioned thereby, or that a proximal and distal end of asingle lace are coupled with the closure device and tensioned thereby.The two or more laces may each have a distal end that terminates on theshoe or article, or on a housing or other component of the closuredevice, and a proximal end that is coupled with the closure device andtensioned thereby.

Referring now to FIGS. 4E-4G, illustrated are cross-sectional views ofthe reel assembly 402 in the various configurations described above.FIG. 4E illustrates the reel assembly 402 with the spool 410 fullyengaged with tension control disc 420. As shown in FIG. 4E, in thisconfiguration the teeth 414 of spool 410 are disengaged from the teeth408 of housing 404 such that a gap exists between the teeth 408 and 414.In contrast, the teeth 426 of tension control disc 420 are fully engagedwith the teeth 412 of spool 410 such that the spool 410 is pulled orforced axially upward and into full engagement with tension control disc420. In this configuration, spool 410 is able to be rotated in both thetightening and loosening direction to incrementally tension and/orloosen lace (not shown) of reel assembly 402.

FIG. 4F illustrates the reel assembly 402 with the knob 470 and othercomponents (i.e., pawl disc 430, tension control disc 420, and disc 440)raised axially relative to housing 404 such that pawl teeth 432 aredisengaged from the housing teeth 406 and such that teeth 412 and 426 ofspool 410 and tension control disc 420, respectively, are disengaged. Inthis configuration, the spool 410 is able to freely rotate in theloosening direction to fully release or loosen the tension of the laceof reel assembly 402.

FIG. 4G illustrates the reel assembly 402 with the teeth 408 of housing404 fully engaged with the teeth 414 of spool 410. FIG. 4G alsoillustrates the back surfaces of teeth 412 and 426 contacting oneanother such that the spool 410 is forced or pressed axially downward toincrease the frictional contact between teeth 408 and 414 and therebyprevent rotation of spool 410 in the loosening direction. FIG. 4Gfurther illustrates the teeth 412 and 426 sliding axially up and overone another as the knob 470 and tension control disc 420 are rotated inthe loosening direction. As previously described, in some embodimentsthe knob 470, tension control disc 420, and/or other components (pawldisc 430 and disc 440) may move slightly axially upward and downward asteeth 426 slide up and over spool teeth 412.

In some embodiments, a spring mechanism—e.g., spring washer and thelike—(not shown) may be positioned between the spool 410 and the tensioncontrol disc 420 to provide an axially downward force on the spool 410.The axially downward force provided by the spring mechanism may causethe spool 410 to move axially downward while some amount of tensionremains in the lace. To facilitate downward movement of the spool 410via the spring mechanism, the angle or taper of the teeth 412 and theteeth 426 of the tension control disc 420 may be adjusted or decreasedso that engagement of the teeth does not aggressively pull the spool 410axially upward. For example, the angle or taper of the teeth 412 andteeth 426 may be 10 degrees or less, 5 degrees or less, and the like, asmeasured from a plane parallel to an axis of the spool to allow theteeth 412 and the teeth 426 to easily disengage via the springmechanism. In this manner, the teeth 408 and 414 of housing 404 andspool 410, respectively, may engage with one another to prevent furtherrotation of spool 410 while some amount of tension remains in the lace.This arrangement may keep or maintain a relatively tight wind of thelace about the spool 410 so as to prevent kinking, buckling, entangling,or other lace issues from occurring within housing 404. This arrangementmay also prevent a user from fully loosening the lace tension to preventthe user from removing an article from a limb, such as a brace. Suchembodiments may be employed to ensure that a minimum amount of tensionremains in the lace to ensure, for example, that a brace or otherarticle is being worn properly. For example, a physician may prescribe aminimum fit or brace pressure for a patient and the closure system maybe used to ensure that the patient never loosens the brace beyond theprescribed minimum fit.

In some embodiments, the spring mechanism may be varied to provide adesired amount of axial force on spool 410. For example, a relativelyflexible spring mechanism may be used when a small axial force isdesired, or a relatively stiff spring mechanism may be used when a largeaxial force is desired. An intermediate spring stiffness may likewise beused when an intermediate axial force is desired.

Referring now to FIG. 5, illustrated is a cross sectional view ofanother embodiment of an incremental lace loosening reel assembly 502.Reel assembly 502 is similar to reel assembly 402 in that reel assembly502 includes a housing 504, knob 570, spool 510, disc 540, tensioncontrol disc 520, and pawl disc 530. Rotation of the knob 570 causesdisc 540, pawl disc 530, and tension control disc 520 to rotate asdescribed above. The pawl teeth 532 of pawl disc 530 interact withhousing teeth 506 of housing 504 to hold the spool 510 in place asdescribed above. As knob 570 is rotated in a loosening direction, thepawl teeth 532 of pawl disc 530 are swept out of contact with thehousing teeth 506 of housing 504 as previously described to allow thespool 510 to counter-rotate and thereby loosen the lace. To preventback-winding of the lace about spool 510, or in other words to preventover-rotation of the spool 510 in the loosening direction, the spool 510is configured to move axially upward and downward within housing 504such that a stop mechanism (i.e., teeth 514 and 508 of housing 504 andspool 510, respectively) engage and disengage to limit counter-rotationof the spool 510 as previously described. The spool teeth 512 are alsoangled as previously described to allow the teeth 526 of tension controldisc 520 to deflect axially upward and over the spool teeth 512 whenteeth 514 and 508 are engaged. The various other components of reelassembly 502 (e.g., components 560, 550, 554, 542, 534, 522, 524, and516) may function similar to the corresponding component of reelassembly 402.

Unlike reel assembly 402, however, reel assembly 502 includes a springwasher 552 that is positioned between the spool 510 and tension controldisc 520 and that functions to bias the spool 510 axially downward andinto engagement with the stop mechanism (i.e., biases engagement ofteeth 514 and 508). The spring washer 552 allows the stop mechanism tobe engaged at a lace tension threshold that may be substantially greaterthan zero. The use of the spring washer 552 may be important in medicalbrace applications and/or to further ensure that the lace and/orinternal components of reel assembly 502 are protected.

In some embodiments, the reel assembly 502 may not configured to allow auser to pull axially upward on knob 570 to disengage the spool teethfrom the housing teeth and thereby allow the spool 510 to freelyrotation within housing 504 to fully loosen the lace. Rather, the spoolteeth and housing teeth of reel assembly 500 may always be engaged suchthat tensioning and loosening of the lace is achieved by rotation andcounter-rotation of the knob 570.

Referring now to FIGS. 6A-G, illustrated is another embodiment of anincremental lace loosening device or system. In this embodiment, thelace loosening device or system is capable of providing essentiallyinfinite lace loosening increments, steps, or amounts. Stateddifferently, instead of allowing the lace to be loosened in discretesteps or amounts, the lace loosening system of FIGS. 6A-G allowsmicro-adjustments of lace tension to be made. The system includes a reelassembly 600 having a tensioning mechanism or knob 604 that is rotatableby the user in a tightening and loosening direction to tension andloosen the lace as desired. The knob 604 includes a tension releasemechanism that is configured to allow a spool 610 to be rotated in afirst direction via a first operation of the knob 604 to incrementallytension the lace and to allow the spool 610 to be rotated in a seconddirection via a second operation of the knob 604 such that the tensionmember's tension is releasable in substantially infinitely smallincrements. Specifically, the tension release mechanism includes a firstclutch component or disc 620 that couples with a second clutch componentor disc 608. The second disc 608 is in turn coupled with the spool 610around which the lace is wound. A pawl disc 606 is positioned betweenthe first disc 620 and the second disc 608. The components fit within aninterior region of housing 602. FIG. 6G illustrates the assembledcomponents of reel assembly 600 without the housing 602.

As described in greater detail herein below, the first disc 620 and thesecond disc 608 are axially aligned and frictionally engageable so thata first operation of the knob 604 (i.e., rotation of the knob in thetightening direction) frictionally engages the first disc 620 and thesecond disc 608 to allow the spool to be rotated in the first directionand so that a second operation of the knob 604 (i.e., rotation of theknob in the loosening direction) disengages the first disc 620 and thesecond disc 608 to allow the spool 610 to be rotated in the looseningdirection. The spool 610 is allowed to rotate in the loosening directionuntil rotation of the knob 604 in the loosening direction is ceasedwhereupon the first disc 620 reengages with the second disc 608 if thelace's tension is greater than a tension threshold (e.g., near zerotension). In some embodiments, the tension release mechanism (i.e.,first disc 620 and second disc 608) may also be configured to preventthe lace's tension from being loosened via rotation of the knob 604 inthe loosening direction after the lace's tension achieves or decreasesbeyond the tension threshold.

The pawl disc includes pawl teeth 607 that interact with housing teeth612 of housing 602 as described herein to allow the spool 610 to bewound in the tightening direction and to prevent unwinding of the spool610 in the loosening direction. Similarly, the spool 610 includes spoolteeth 614 that interact with teeth 616 positioned on the bottom surfaceof the second disc 608. Engagement of the teeth 616 and 614 prevent thespool 610 from rotating in the loosening direction.

As shown in greater detail in the cross sectional side view of FIG. 6Cand the perspective views of FIGS. 6D and 6E, the first disc 620includes a central protrusion that extends axially downward. The centralprotrusion includes cam surfaces 622 that interact with cam surfaces 624of an axially upward extending protrusions of second disc 608. The camsurfaces, 622 and 624, are oppositely ramped or angled such thatrotation of the first disc 620 in the tightening direction relative tosecond disc 608 causes the ramped or angled surfaces to slide intofrictional engagement, or to increase frictional engagement, which pullsthe second disc 608 axially upward relative to first disc 620, or viceversa.

Rotation of the first disc 620 in the loosening direction relative tothe second disc 608 causes the ramped or angled surfaces to slide out offrictional engagement, or decreases frictional engagement, which allowsthe second disc 608 to move axially downward relative to first disc 620,or vice versa.

As shown, the cam surfaces 622 of first disc 620 fit axially under thecam surfaces 624 of second disc 608. As the knob 604 and first disc 620are rotated in the tightening direction, cam surfaces 622 slide relativeto cam surfaces 624 to increase the frictional engagement or contactbetween the two components, which pulls the second disc 608 axiallyupward relative to first disc 620. Movement of the second disc 608axially upward relative to first disc 620 compresses or pinches the pawldisc 606 between the first disc 620 and second disc 608 as shown in FIG.6F, which locks or maintains the discs (i.e., the first disc 620, seconddisc 608, and pawl disc 606) in position. The pawl disc 606 isrotationally maintained or locked in place relative to housing 602 viathe interaction between the pawl teeth 607 and the housing teeth 612.The spool 610 is maintained or locked in rotational position relative tothe housing 602 via the pressed or pinched pawl disc 606 and theinteraction between the spool teeth 614 and the teeth 616 of second disc608. In this manner, the components of reel assembly 600 are held inrotational position relative to the housing 602 and counter-rotation(i.e., rotation in the loosening direction) is prevented.

Further rotation of the knob 604 in the tightening direction causes thefirst disc 620, the second disc 608, and the pawl disc 606 to alsorotate in the tightening direction via the interaction between the camsurfaces 622 and 624 and the compression of the pawl disc 606 betweenthe first and second discs 620 and 608. Rotation of the second disc 608in the tightening direction also causes the spool 610 to rotate in thetightening direction via interaction of the teeth 614 and 616, whichallows the lace to be further tensioned.

When the knob 604 is counter-rotated or rotated in the looseningdirection, the cam surfaces 622 and 624 begin to frictionally disengage,which allows the second disc 608 to move axially downward and loosensthe compressive pressure exerted on the pawl disc 606. As thecompressive pressure exerted on the pawl disc 606 is reduced, the seconddisc 608 becomes frictionally unlocked from the pawl disc 606 and isable to slip or rotate in the loosening direction, which allows the lacetension to be loosened. As long as a predetermined amount of tensionexists in the lace, the lace will cause the spool 610 to rotate in theloosening direction, which causes the second disc 608 to also rotate inthe loosening direction. Rotation of the second disc 608 in theloosening directions causes the cam surfaces 624 to rotate relative tothe cam surfaces 622 of first disc 620 thereby frictionally reengagingthe cam surfaces 624 and 622 and discs 620 and 608. This reengagement ofthe cam surfaces, 624 and 622, and the respective discs, 608 and 620,recompresses the pawl disc 606 and locks the discs in position, therebypreventing further counter-rotation of the discs.

The slippage of the second disc 608 relative to first disc 620 may berelatively instantaneous such that a user is unable to detect orotherwise notice the slippage of the second disc 608. Similarly, thefrictional re-engagement of the first disc 620 and second disc 608 maybe unnoticeable or undetectable by the user such that as the user stopscounter rotation of the knob 604 (i.e., rotation of the knob 604 in theloosening direction), the user may be unable to detect or notice anyadditional movement of the second disc 608 or any other internalcomponent. Rather, the user may believe that rotation of the knob 604 ineither the tightening or loosening direction results in immediaterotation of the second disc 608 and spool 610 corresponding to animmediate tensioning or loosening of the lace. Since the rotation of thesecond disc 608 may be virtually identical to the rotation of the knob604, the reel assembly 600 provides essentially an infinite amount andrelatively precise lace loosening adjustment. Stated differently, a usermay counter rotate the knob 604 by essentially infinitely smallincrements, degrees, or amounts, which causes loosening of the lace bycorrespondingly small increments, degrees, or amounts. The tensionrelease mechanism (i.e., first disc 620 and second disc 608) of reelassembly 600 allows the spools 610 to be releaseably locked in anyangular orientation within the housing upon cessation ofcounter-rotation of the knob 604. This allows the lace's tension to beloosened or released in substantially infinitely small increments asdescribed above.

In some embodiments, the cam surfaces 622 may be directly incorporatedwith the knob 604 rather than being included on a separate disc 620.Similarly, the second disc 608 may be incorporated with the spool 610rather than using separate components. Other components of reel assembly600 may likewise be integrated to reduce the overall component count.

In some embodiments, the reel assembly 600 may include a stop mechanismthat prevents rotation of the spool 610 in the loosening direction afterthe lace's tension achieves or decreases beyond a tension threshold. Forexample, a bottom surface of the spool 610 includes teeth 626 thatextend axially downward from a bottom surface of the spool 610. Asdescribed above, the teeth 626 may engage with corresponding teeth 628that extend axially upward from an inner surface of the housing 602 toprevent or restrict rotation of the spool 610 in the loosening directionafter the lace's tension achieves or decreases beyond a tensionthreshold. As described above, the spool 610 may move axially upward anddownward to engage and disengage the stop mechanism (i.e., engage anddisengage teeth 626 and 628). In some embodiments, as the knob 602 isrotated in the loosening direction after the teeth 626 and 628 areengaged, the cam surfaces 622 and 624 may be configured to skip over orrelative to one another. In other embodiments, engagement of the teeth626 and 628 may prevent further rotation of the knob 604 in theloosening direction.

In some embodiments, the reel assembly 600 may also include a fullrelease mechanism that is transitionable between an engaged state and adisengaged state. The full release mechanism may include a bushing 630and spring component 640 as previously described that transition betweenthe engage state and the disengaged state when the knob 604 is pulledaxially upward or pushed axially downward relative to housing 602. Insuch embodiments, when the full release mechanism is in the engagedstate (i.e., positioned axially downward relative to housing 602), theknob 604 may be rotated to tension or loosen the lace. When the fullrelease mechanism is in the disengaged state (i.e., positioned axiallyupward relative to housing 602), the lace's tension may be automaticallyand/or fully loosened or released.

In some embodiments, the pawl disc 606 may be configured to fit aroundthe cam surface 624 of second disc 608. This configuration may allow thefirst disc 620 and second disc 608 to more easily compress the pawl disc606 and/or allow greater compressive pressures to be exerted on the pawldisc 606.

Referring now to FIGS. 7A and 7B, illustrated is another embodiment ofan incremental lace loosening system. Specifically, FIGS. 7A and 7Billustrate a reel assembly 700 having a knob 702 that is rotatable by auser as described herein. The knob 702 couples with a drive disc 704that is rotated as the user rotates knob 702. The drive disc 704 mayinclude a plurality of apertures 712 through which corresponding shafts710 of the knob 702 are inserted in order to drive rotation of disc 704via rotation of knob 702. Drive disc 704 in turn is used to drive spool706 in both the tightening and loosening direction. Drive disc 704includes gear teeth or cogs 705 that fit within recesses 703 of spool706 in order to drive spool 706.

A profile of the outer surface 707 of spool 706 corresponds to a profileof the outer surface 709 of drive disc 704 such that during rotation ofthe drive disc 704 while the teeth 705 and recesses 703 are disengaged,the outer surface 709 of drive disc 704 slides along the outer surface707 of spool 706. The configuration of the outer surfaces, 707 and 709,of the spool 706 and drive disc 704, respectively, prevents rotation ofthe spool 706 in the loosening direction because any such rotationcauses the outer surface 707 of the spool 706 to contact the outersurface 709 of the drive disc 704. In this manner, the spool 706 anddrive disc 704 are essentially locked in place by the configuration ofthe outer surfaces, 707 and 709, of the components. The embodiment ofFIGS. 7A and 7B provide a silent tightening/loosening mechanism thatgenerally requires less parts than other tightening mechanisms. Theembodiment also allows for very small incremental tightening/looseningsteps, which allows for precise lace tensions to be achieved.

Referring now to FIG. 8, illustrated is another embodiment of a deviceor system that allows the lace tension to be incrementally loosened.Specifically, FIG. 8 illustrates a reel assembly 800 having a pawl disc806 that is positioned within a housing 802 as described herein suchthat the pawl teeth 807 of pawl disc 806 interact with the housing teeth804 of housing 802 to prevent counter rotation of the spool (not shown).In order to allow the lace tension to be incrementally loosened, reelassembly 800 includes a plurality of sweeper arms 808 that are coupledwith a knob (not shown) of reel assembly 800. As shown in image 2, asthe knob of reel assembly 800 is counter rotated (i.e., rotated in theloosening direction), the sweeper arms 808 contact the pawl teeth 807and sweep the pawl teeth 807 out of contact with the housing teeth 804.At the same time, sweeper arms 808 flex radially outward such that teethof the sweeper arms 808 deflect into contact with the housing teeth 804(image 2 and 3).

If tension exists within the reel assembly's lace, the tension willcause the spool (not shown) to counter rotate (i.e., rotate in theloosening direction), which will cause the pawl disc 806 to also counterrotate. Counter rotation of the pawl disc 806 will cause the pawl teeth807 to become disengaged from the sweeper arms 808 and to radiallydeflect outward and into contact with the housing teeth 804 (image 4).If tension does not exist within the reel assembly's lace, the spool andpawl disc 806 will not counter rotate. Rather, the spool and pawl disc806 will remain in relatively the same position engaged with the sweeperarms 808. In this manner, the lace may be loosened only whileessentially some amount of tension remains in the lace, which mayprevent some of the lace loosening problems identified above. Thesweeper arms 808 will remain engaged with the housing teeth 804 untilthe knob (not shown) is released or rotated slightly in the tighteningdirection. In this manner, the incremental loosening of the lace isachieved via back-and-forth rotation of the reel assembly's knob. Insome embodiments, the knob may be biased so as to disengage the sweeperarms 808 from the housing teeth 804 upon a user releasing the knob.

Referring now to FIGS. 9A-K, illustrated are embodiments of incrementallace loosening systems or devices in which pressing a knob or buttoncauses the lace tension to be incrementally loosened. Specifically,FIGS. 9A-C illustrate a reel assembly 900 wherein pressing the knob 904axially downward relative to the housing 902 causes the pawl teeth 914of pawl disc 906 to be temporarily disengaged from the housing teeth 912of housing 902. As shown in FIGS. 9A-C, the pawl teeth 914 have achamfered or angled upper surface that is engaged by an axially downwardextending protrusion 916 of knob 904. The downward extending protrusion916 includes a chamfered or angled bottom surface that contacts thechamfered or angled upper surface of pawl teeth 914 to causes the pawlteeth 914 to deflect radially inward and out of engagement with thehousing teeth 912 upon depression of the knob 904 axially downwardrelative to housing 902.

Disengagement of the pawl teeth 914 from the housing teeth 912 causesthe spool (not shown) and pawl disc 906 to rotate in the looseningdirection as long as some amount of tension remains in the lace.Rotation of the pawl disc 902 in the loosening direction causes the pawlteeth 914 to become disengaged from the protrusion 916 of knob 904,which causes the pawl teeth 914 to deflect radially outward and intoengagement with the housing teeth 912. In this manner, incrementalloosening of the lace is achieved each time the knob 904 is pressedaxially downward.

In some embodiments, the pawl disc 906 may include a pair of teeth thatare always engaged with the housing teeth 912 and a pair of teeth thatare always disengaged from the housing teeth 912. For example, as shownin FIG. 9B, a first pair of pawl teeth 914 a may be engaged with thehousing teeth 912 while a second pair of pawl teeth 914 b is disengagedfrom the housing teeth 912. The pairs of housing teeth, 912 a and 912 b,may be configured such that the pairs of teeth are a half step off fromone another, or in other words so that the non-engaged pair of teeth ishalfway engaged with the housing teeth 912. The knob 904 may beconfigured so that the protrusions 916 are always positioned axiallyabove the pair of teeth (i.e., initially pawl teeth 914 a) that areengaged with the housing teeth 912. Depression of the knob 904 causesthe engaged pair of teeth 914 a to disengage from housing teeth 912,which causes counter rotation of the pawl disc 906 as described above.As the pawl disc 906 counter-rotates, the previously disengaged teeth914 b will engage with the housing teeth 914 while the previouslyengaged teeth 914 a remain disengaged from housing teeth 912. In thismanner, depression of the knob 904 will cause the lace to be loosened inhalf steps increments. The half step increments may also help reduce theimpact of the pawl teeth during engagement with the housing teeth, whichmay increase the life of the pawl teeth and reel assembly. In someembodiments, the knob 904 may rotate after each depression so that theprotrusions 916 are always positioned axially above the pair of teeththat are engaged with the housing teeth 912.

Referring now to FIGS. 9D-H, illustrated is another embodiment of anincremental lace loosening system where depression of a button causesincremental loosening of the lace. The system of FIGS. 9D-H includes ahousing 930 that is similar to the reel assembly housings previouslydescribed. For example, housing 930 includes lace ports 938 within whichthe lace enters and exits the housing 930. Unlike the other housings,however, housing 930 does not include housing teeth that are rigidlycoupled with an interior space of the housing 930. Rather, a toothedring or disc 940 is positioned within a cylindrical inner surface 933 ofhousing 930. The toothed ring 940 is configured to be rotatable withinthe cylindrical inner surface 933 of housing 930 rather than rigidlycoupled therewith. The toothed ring 940 includes a plurality of teeth942, which are configured to interact with pawl teeth (not shown) of apawl disc (not shown) as previously described to prevent counterrotation of the pawl disc and a spool (not shown).

A button mechanism 950 is coupled with housing 930 to prevent rotationof the toothed ring 940. Specifically, housing 930 includes a recess orchannel 934 within which the button mechanism 950 is positioned. Tocouple the button mechanism 950 with the housing 930, a pin 958 isinserted within an aperture 935 of the channel 934 and through acorresponding aperture 957 of button mechanism 950. Pin 958 pivotablycouples the button mechanism 950 within channel 934. Button mechanism950 includes a pressable portion 952 and two protrusions 954 and 956that are positioned on opposite ends of the button mechanism 950.

As shown in FIG. 9H, which is a top cross sectional view taken alongplane A-A of FIG. 9G, as the button mechanism 950 pivots within channel934 via radially pressing of portion 952, one of the protrusions, 954 or956, pivots radially through an aperture or window of housing 930 andinto the cylindrical inner surface 933 while the other protrusion, 954or 956, pivots radially outside of the cylindrical inner surface 933.Radially pressing portion 952 of button mechanism 950 causes theprotrusions, 954 and 956, to displace radially into and out of the innercylindrical surface 933 of housing 930.

The toothed ring 940 includes a plurality of apertures or recesses 946within which the protrusions, 954 and 956, of button mechanism 950 arepositionable. As long as one of the protrusions, 954 or 956, ispositioned within one of the recesses 946 of the toothed ring 940, thetoothed ring 940 will be prevented from rotating. Radially pressing theportion 952 of button mechanism 950 to pivot the protrusions, 954 and956, however, will allow the toothed ring 940 to temporarily rotate inthe loosening direction. For example, as shown in FIG. 9H, in a firststate protrusion 954 is positioned within one of the recesses 946 oftoothed ring 940 while protrusion 956 is displaced outside of therecesses 946. Depressing the portion 952 causes button mechanism 950 topivot such that protrusion 954 is pivoted out of the recesses 946 whileprotrusion 956 is pivoted into another recesses 946.

The protrusions, 954 and 956, are configured so that as the protrusionspivot into and out of the recesses 946, the toothed ring 940incrementally rotates in the loosening direction. For example, asprotrusion 956 is pivoted within a recess 946, the toothed ring 940 willrotate slightly in the loosening direction before a wall of the recess946 contacts the protrusion 956. Similarly, as protrusion 954 is pivotedwithin a recess 946, the toothed ring 940 will rotate slightly in theloosening direction before a wall of the recess 946 contacts protrusion954. In this manner, each time the portion 952 is pressed, the toothedring 940 will be allowed to rotate in the loosening direction by someincremental amount. The button mechanism 950 may include a spring 955,or other biasing mechanism, that biases the button mechanism 950 towardthe first state with protrusion 954 positioned within a recess 946.Stated differently, as a user releases portion 952, the button mechanism950 may automatically pivot so that protrusion 954 is positioned withina recess 946. In this manner, a user may merely press and releaseportion 952 of button mechanism 950 to cause incremental loosening ofthe lace. Because the toothed ring 940 is able to rotate in theloosening direction, the pawl disc (not shown), spool (not shown),and/or other components (e.g., knob and the like) that are coupled withthe toothed ring 940 are also able to rotate.

Rotation of the toothed ring 940 in the loosening direction is actuatedby lace tension. As such, when the lace tension is essentially fullyloosened or released, counter-rotation of the toothed ring 940 and otherreel assembly components with be prevented or limited. For example, asthe lace tension pulls on the spool (not shown), a counter-rotationalforce is transmitted to the spool and any components coupled therewith,such /as the toothed ring 940. The counter-rotational force that istransmitted to the toothed ring 940 via the lace tension and spool willcause the toothed ring to counter rotate as the portion 952 is pressed.In this manner, the toothed ring 940 and spool will only rotate as longas some level of tension exists within the lace and will not rotate whenthe lace tension is fully loose or released.

Referring now to FIGS. 9I-K, illustrated is another embodiment of anincremental lace loosening system. The reel assembly 970 of this systemachieves incremental lace loosening as a pawl disc 980 displaces axiallyupward and downward within the reel assembly's housing 972.Specifically, housing 972 includes a first level of housing teeth 976and a second level of housing teeth 974 that is positioned axially abovethe first level of housing teeth 976. As the pawl disc 980 is pressedaxially downward relative to the housing 972, the pawl teeth 982 areforced from the second level of housing teeth 974 into the first levelof housing teeth 976. Similarly, as the pawl disc 980 is moved axiallyupward relative to the housing 972, the pawl teeth 982 are forced fromthe first level of housing teeth 976 into the second level of housingteeth 974.

The levels of housing teeth, 976 and 974, are arranged such that eachmovement from one level of housing teeth to the other level of housingteeth causes an incremental counter-rotation of the pawl disc 980 andany components coupled therewith (e.g., the spool, knob, and the like)in the loosening direction. In some embodiments, each movement betweenhousing teeth levels may cause a half step rotation or in other words,may cause the pawl disc 980 to rotate approximately ½ the circular pitchof the housing teeth. For example, as shown in 990 of FIG. 9K, the pawlteeth 982 may be initially engaged with the second housing teeth 974. Asshown in 992 of FIG. 9K, the pawl disc 980 may be moved axially downwardrelative to housing 972 so that the pawl teeth 982 engage with the firsthousing teeth 976 and the pawl disc 980 rotates a half step in theloosening direction. As shown in 994 of FIG. 9K, the pawl disc 980 maythen be moved axially upward relative to housing 972 so that the pawlteeth 982 reengage with the second housing teeth 974 and the pawl disc980 again rotates a half step in the loosening direction.

The pawl disc 980 may be moved axially downward and/or upward bypressing on and releasing the reel assembly's knob (not shown). Further,the pawl disc 980 may be biased toward the second housing teeth level974 so that upon release of the reel assembly's knob, the pawl disc 980automatically adjust axially upward into engagement with the secondhousing teeth level 974. In this manner, a user may effectuateincremental loosening of the lace tension by repeatedly pressing on thereel assembly's knob.

In some embodiments, incremental loosening of lace tension can beachieved via the lace guides rather than or in addition using the reelassembly. For example, the lace guides may be adjusted so as toincrementally decrease the tension on the lace, or the system mayinclude an additional component that may be adjusted to incrementallyloosen the tension on the lace. FIGS. 10A-11I illustrate variousembodiments of lace guides that may be used to incrementally loosentension on the lace.

Referring now to FIGS. 10A-C, illustrated is an embodiment in which aguide 1007 is used to incrementally loosen tension on the lace.Specifically, the lacing system 1000 includes a reel assembly 1002 thatis operated as described herein to tension lace 1004. The lace 1004 iswound around a plurality of guides (i.e., guides 1006, 1007, and 1008)that direct the lace 1000 along a lace path of the lacing system 1000.The lacing system 1000 includes a plurality of guide systems positionedlongitudinally along the lace path. Each guide system includes a firstend guide 1006, a second end guide 1008, and an intermediate guide 1007that is positioned between the first end guide 1006 and the second endguide 1008. Each guide system redirects the lace 1004 from a firstdirection to a second direction.

The intermediate guide 1007 is adjustable so as to incrementally loosenthe tension on the lace by varying the lace path of the guide system.The intermediate guide 1007 functions similar to a cam component toengage and disengage the lace 1004 and thereby affect the lace path andtension. For example, the intermediate guide 1007 may pivot between afirst position (i.e., 1 of FIGS. 10A-C) in which the intermediate guide1007 engages the lace 1004 and a second position (i.e., 2 of FIGS.10A-C) in which the intermediate guide 1007 disengages the lace 1004.Because the intermediate guide 1007 engages the lace 1004 in the firstposition, the overall lace path is longer and the tension in the lace1004 is increased as the lace 1004 slightly stretches and/or the lacedarticle (e.g., a shoe) is closed more tightly. Similarly, because theintermediate guide 1007 does not engage the lace 1004 in the secondposition, the overall lace path is shorter and the tension in the lace1004 is decreased as the lace 1004 relaxes and/or the laced article(e.g., a shoe) is slightly opened. The above scenario assumes that theoverall lace length in the system remains unchanged. Stated differently,the above scenario assumes that no lace is added or removed as theintermediate guide 1107 is adjusted.

In some embodiments, the intermediate guide 1007 may engage a stopmember 1009 when the intermediate guide 1007 is positioned in the firstposition. The stop member 1009 may prevent the intermediate guide 1007from rotating out of the first position, in which the intermediate guide1007 engages the lace 1004. The intermediate guide 1007 may also bepositioned such that the pressure exerted on the intermediate guide 1007from the lace 1004 presses or maintains the intermediate guide 1007 incontact or engagement with the stop member 1009. For example, theintermediate guide 1007 may be positioned slightly off center from apivot of the intermediate guide 1007 such that the lace tension biasesthe intermediate guide 1007 to rotate toward and/or into engagement withthe stop member 1009. Since the intermediate guide 1007 is biasedslightly toward the stop member 1009, rotation of the intermediate guide1007 away from the stop member 1009 may cause the tension in the lace toslightly increase before the intermediate guide 1007 is disengaged fromthe lace 1004 to decrease the lace tension.

In some embodiments, the intermediate guide 1007 may include a tab 1005that is grippable by a user to aid in rotating the intermediate guide1007 away from the stop member 1009. For example, the tab 1005 may allowa user to easily place a thumb or finger atop the intermediate guide1007 and rotate the intermediate guide 1007 away from the stop member1009. In some embodiments, the intermediate guide 1007 may include aninternal spring (not shown) that biases the intermediate guide 1007toward the stop member 1009 when tension is loosened from the lace 1004.In such embodiments, when the tension on the lace 1004 is fully loosenedor released, the internal spring may cause the intermediate guide 1007to pivot into engagement with the stop member 1009. As such, upon fullyreleasing the lace tension, the intermediate guides 1007 of the lacingsystem 1000 may return to the first position so that upon re-tensioningof the lace 1004 via reel assembly 1002, the intermediate guides 1007may be used to incrementally loosen the lace 1004.

Although the guide systems in the embodiment of FIGS. 10A-C have beengenerally described as each including an intermediate guide 1007, insome embodiments one or more of the guide systems may not include anintermediate guide 1007. For example, guide systems positioned closer toa user's toe may not include an intermediate guide 1007 while guidesystems positioned closer to the user's ankle or heel do include theintermediate guides. Such systems may allow the user to easily adjustthe lace tension by placing the intermediate guides 1007 in areas thatare more easily accessible to the user.

Referring now to FIGS. 10D and 10E, illustrated is another embodiment ofthe lacing system 1010 that includes an adjustable guide 1016 that maybe used to incrementally loosen tension on the lace. The lacing system1010 includes one or more of the adjustable guides 1016 and/or one ormore reel assemblies 1012. As shown in FIGS. 10D and 10E, the adjustableguides 1016 may be positioned laterally across from a reel assembly 1012and/or may include one or more non-adjustable lace guides 1018. In otherembodiments, lacing system 1010 may include a single reel assembly 1012and a combination of adjustable guides 1016 and/or non-adjustable guides1018.

In some embodiments, the adjustable guide 1016 may have a non-circularprofile or surface (e.g., oblong or oval configuration) such thatrotation of the adjustable guide 1016 relative to the lace 1014 altersthe lace path by affecting the contact or engagement of the guide 1016with the lace 1014. In this manner, the guide 1016 may function similarto a cam component to affect the lace path and tension. For example, ina first position (position C), the adjustable guide 1016 may be rotatedsuch that a large area or cam surface of the adjustable guide 1016engages or contacts the lace 1014 and increases the lace path. Stateddifferently, the adjustable guide 1016 may engage the lace 1014 by amaximum amount. In this position (i.e., position C), the path of thelace 1014 may be fully extended so that the tension on the lace 1014 isat or near a maximum tension.

To decrease the tension on the lace, the adjustable guide 1016 may berotated to a second position (position B), such that a smaller area orcam surface of the adjustable guide 1016 engages or contacts the lace1014, or stated differently, so that the adjustable guide 1016 engagesthe lace 1014 by an amount less than position C. In this position (i.e.,position B), the path of the lace 1014 may be decreased compared withposition C so that the tension on the lace 1014 is decreased. To furtherdecrease the tension on the lace, the adjustable guide 1016 may again berotated to a third position (position A), such that a smallest cam areaor surface of the adjustable guide 1016 engages or contacts the lace1014. Stated differently, the adjustable guide 1016 may engage the lace1014 by a minimal amount. In this position (i.e., position A), the pathof the lace 1014 may be minimal so that the tension on the lace 1014 isat or near a minimum tension. When multiple adjustable guides 1016 areused in the lacing system 1010, each guide 1016 may be adjusted betweenpositions A-C to vary the overall tension in the lace 1014.

Referring now to FIGS. 11A-I, illustrated are embodiments in which aguide component moves laterally along a track to incrementally decreasetension in the lace. For example, FIGS. 11A-D illustrate a guide 1102having entrance and exit ports 1103 for the lacing system's lace asdescribed herein. The guide 1102 is configured to move laterally along atrack 1104, which is positioned laterally across a shoe or other articlebeing tightened with the lacing system. The track 1004 includes teeththat engage with corresponding teeth 1112 of an internal ratchetcomponent 1110 of the guide 1102. The engagement of the teeth of track1104 and internal ratchet component 1110 allows the guide 1102 toincrementally move along the track 1104. Specifically, the ratchetcomponent 1110 is positioned within a lumen of the guide 1102 such thatthe ratchet component 1110 is able to rotate within the lumen. Rotationof the ratchet component 1110 within the lumen of guide 1102 allows theratchet component's teeth 1112 to engage with and move along the teethof the track 1104 in a rack and pinion like manner. Movement of theratchet component 1110 along the track 1104 in this manner enables theguide 1102 to move laterally along the track 1104.

Rotation of the ratchet component 1110 within the lumen is controlledvia a pair of stop clutches 1106 that are positioned within the guide'slumen on opposing ends of the ratchet component 1110. The stop clutches1106 control the rotation of the ratchet component 1110 in order tocontrol the movement of the guide 1102 along the track 1104. The stopclutches 1106 are prevented from rotation within the guide's lumen viaan interaction between the stop clutches' teeth 1122 and correspondingteeth 1128 positioned within the lumen of guide 1102. The stop clutches1106 also include a plurality of axially arranged blocks 1124 thatengage with corresponding blocks 1114 of the ratchet component 1110 toprevent rotation of the ratchet component 1110 within the lumen when theteeth 1122 of clutch 1106 disengage from the teeth 1128 of guide 1102.

To control rotation of the ratchet component 1110 when the teeth 1122 ofclutch 1106 disengage from the teeth 1128 of guide 1102, the blocks 1124of the stop clutches 1106 are arranged with a first level of blocks 1124b and a second axial level of blocks 1124 a that are positioned axiallyinward of and circumferentially offset from the first level of blocks1124 b. The stop clutches 1106 are positioned within the lumen of theguide 1102 such that the second level of blocks 1124 a initially engagethe ratchet component's blocks 1114. The stop clutches 1106 may then bepressed axially inward within the lumen of guide 1102 such that theteeth 1122 of clutch 1106 disengage from the teeth 1128 of guide 1102and the ratchet component's blocks 1114 slide out of engagement with thesecond level of blocks 1124 a and into engagement with the first levelof blocks 1124 b positioned axially outward from the second level ofblocks. Since the first level of blocks 1124 b are circumferentiallyoffset from the second level of blocks 1124 a and the teeth 1122 of theclutches 1106 are disengaged from the teeth 1128 of the guide 1102, theratchet component 1110 is able to rotate within the lumen of guide 1102until the ratchet component's blocks 1114 contact or engage with thefirst level of blocks 1124 b. Engagement of the blocks 1114 with thefirst level of blocks 1124 b prevents further rotation of the ratchetcomponent 1110.

A spring component 1126 is positioned within the lumen of guide 1102 andbetween the stop clutches 1106. Spring component 1126 biases the stopclutches 1106 axially outward such that when the stop clutches 1106 arereleased, the stop clutches 1106 slide axially outward relative toratchet component 1110. The axially outward movement of the stopclutches 1106 causes the ratchet component's blocks 1114 to slide out ofengagement with the first level of blocks 1124 b and into engagementwith the second level of blocks 1124 a and causes the teeth 1122 of theclutches 1106 to reengage with the teeth 1128 of the guide 1102. Asdescribed above, since the second level of blocks 1124 a arecircumferentially offset from the first level of blocks 1124 b, theratchet component 1110 is able to rotate within the lumen of guide 1102until the ratchet component's blocks 1114 contact or engage with thesecond level of blocks 1124 a. In this manner, the guide 1102 is able tomove incrementally along track 1104 each time the stop clutches 1106 arepressed axially inward and released.

Movement of the guide 1102 along the track 1104 is caused in response totension within the lace of lacing system 1100. Stated differently,tension in the lacing system's lace is what drives or causes rotation ofthe ratchet component 1110 within the lumen of guide 1102 as the stopclutches 1106 are pressed axially inward and released. As such, when thelease tension is at or near a zero tension level, inward pressing of thestop clutches 1106 will not cause the ratchet component 1110 to rotatewithin the lumen of guide 1102 and/or cause incremental movement of theguide 1102 along the track 1104.

In some embodiments, guide 1102 may include a spring 1108 that iscoupled with the'shoe or other apparel and that biases the guide 1102toward a distal end of the track 1104. In such embodiments, guide 1102may automatically return to the distal end of track 1104 when thetension in the lace is fully loosened. To facilitate distal movement ofthe guide 1102 along the track 1104, the ratchet component's teeth 1112and the teeth of track 1104 may be configured so as to prevent toothengagement, or to allow the teeth to skip over one another, as the guide1102 moves distally along the track 1104. In this manner, when the lacetension is loosened or released from lacing system 1100, the guide 1102may be reset at a distal end of the track 1104 so that uponre-tensioning of the lace, the stop clutches 1106 may be operated toincrementally loosen the tension on the lace.

Referring now to FIGS. 11E-G, illustrated is another embodiment of aguide 1132 that is configured move laterally along a track 1136 in orderto incrementally loosen or decrease the lace tension. The embodiment ofFIGS. 11E-G is similar to FIGS. 11A-D in that the lace tension drives orcauses proximal movement of the guide 1132 along the teeth of the track1136. To effect proximal movement of the guide 1132, the guide 1132include a pull tab 1134 that may be pulled by a user. The pull tab 1134is connected to a first tooth 1138 that is initially engaged with atooth of the track 1136 to prevent movement of the guide 1132 along thetrack 1136. As shown in FIG. 11F, pulling the tab 1134 causes the firsttooth 1138 to disengage from the teeth of track 1136, such as by causingthe tooth 1138 to rotate out of engagement with the tooth. The pull tab1134 simultaneously causes a second tooth 1140 to rotate into positionwithin track 1136 so that upon proximal movement of the guide 1132 (viatension in the lacing system 1130's lace), the second tooth 1140 engageswith the teeth of track 1136.

The pull tab 1134 may then be released by the user to disengage thesecond tooth 1140 from engagement with the teeth of the track 1136, suchas by rotating the second tooth 1140 out of engagement with the track'steeth. Releasing the pull tab 1134 may simultaneously reengage the firsttooth 1138 with the track so that upon proximal movement of the guide1132 via lace tension, the first tooth 1138 reengages with the teeth oftrack 1136. In this manner, the guide 1132 may be incrementally movedalong the track 1136 to loosen the tension in the lacing system 1130'slace. In some embodiments, the first tooth 1138 and second tooth 1140may be arranged approximately ½ step offset from one another so thatpulling and releasing the tab 1134 cause the guide 1132 to moveproximally one step (i.e., one tooth) along the track 1136.

In some embodiments the guide 1132 may include a spring component (notshown) that is configured to bias the guide 1132 distally along thetrack 1136 such that upon fully releasing the tension in the lace, theguide 1132 moves automatically to a distal end of the track 1136. Insome embodiments, a distal end of the first tooth 1138 may be pressed torotate the first and second teeth, 1138 and 1140, into and out ofengagement with the track 1136 rather than, or in addition to, pullingon tab 1134.

Referring now to FIGS. 11H and 11I, illustrated is another embodiment ofa guide 1152 that is configured to move laterally along a track 1154 toincrementally loosen or decrease tension in the lacing system 1150'slace. The guide 1152 includes a button 1156 that may be pressed by auser to effectuate proximal movement of the guide 1152 along the track1154. The guide 1152 includes an internal pivot mechanism 1158 having afirst locking arm 1157 a and a second locking arm 1157 b that arepositioned on opposing ends of a central pivoting member or arm. In aninitial locked positioned, the first locking arm 1157 a may be engagedwith a tooth of the track 1154 so as to prevent proximal movement of theguide 1152 along the track 1154.

Pressing the button 1156 downward causes the button 1156 to contact thesecond locking arm 1157 b, which causes the central pivoting arm topivot within the guide 1152. Pivoting of the central pivot arm allowssome proximal movement of the guide 1152 along the track 1154 by causingthe first locking arm 1157 a to pivot out of engagement with the teethof track 1154 while the second locking arm 1157 b pivots into engagementwith the teeth. A first spring component 1160 is positioned within theguide and in contact with the button 1156 such that upon releasing thebutton 1156, the first spring component 1160 biases the button 1156 outof contact with the second locking arm 1157 b. A second spring component1162 is also positioned within the guide 1152 and in contact with thefirst locking arm 1157 a such that upon releasing the button 1156, thesecond spring component 1162 presses on the first locking arm 1157 a tocause the second locking arm 1157 b to pivot out of engagement with theteeth of track 1154 while the first locking arm 1157 a pivots intoengagement with the teeth after some proximal movement of the guide 1152along the track 1154. In this manner, the guide 1152 may move proximallyalong the track 1154 in incremental steps as the button 1156 is pressedand released by a user.

As with the previous embodiments, the guide 1152 may include a springcomponent (not shown) that is configured to bias the guide 1152 distallyalong the track 1154 such that upon fully releasing the tension in thelace, the guide 1152 automatically moves to a distal end of the track1154. In such embodiments, upon re-tensioning of the lace, the button1156 may then be used to incrementally loosen the lace tension.

According to one embodiment, a method for configuring a reel for usewith a lacing system for tightening an article may include providing ahousing having an interior region and positioning a spool within theinterior region of the housing so that the spool is rotatable relativeto the housing. The spool may have an annular channel formed therein.The method may also include operably coupling a knob with the spool tocause the spool to rotate within the interior region of the housing uponrotation of the knob. The knob may be rotatable relative to the housingso that 1) incremental rotation of the knob in a first direction causesa corresponding incremental rotation of the spool within the interiorregion of the housing that incrementally gathers a tension member in theannular channel formed in the spool and 2) incremental rotation of theknob in a second direction causes a corresponding incremental rotationof the spool that incrementally releases the tension member from theannular channel formed in the spool. The method may also includeconfiguring the reel with a stop mechanism that is configured to preventrotation of the spool in the second direction when a tension of the laceachieves or decreases beyond a tension threshold.

In some embodiments, the stop mechanism may be configured to engage onlywhen the tension of the lace achieves or decreases beyond the tensionthreshold and engagement of the stop mechanism may prevent the spoolfrom rotating in the second direction. In some embodiments, the spoolmay be axially moveable within the interior region of the housing andaxial movement of the spool within the interior region may effectengagement and disengagement of the stop mechanism. In some embodiments,the stop mechanism is moveable between an engaged state and a disengagedstate. In such embodiments, the stop mechanism may be configured to moveinto the engaged state only when the tension of the lace achieves ordecreases beyond the tension threshold and may be configured to moveinto the disengaged state upon rotation of the knob in the firstdirection.

In some embodiments, the stop mechanism includes teeth, a rubber gasket,an abrasive material, a tacky material, and the like. In a specificembodiment, the stop mechanism includes a first set of teeth that arepositioned on a bottom surface of the interior region of the housing anda second set of teeth that are positioned on a bottom flange of thespool. In such an embodiment, the spool is axially moveable within theinterior region of the housing so that when the lace tension achieves ordecreases beyond the tension threshold, the spool moves axially downwardwithin the interior region of the housing to engage the first set ofteeth and the second set of teeth and thereby prevent rotation of thespool in the second direction.

In some embodiments, the method further includes configuring the reelwith a release mechanism that, upon actuation, enables the tensionmember to be automatically released from the annular channel formed inthe spool by allowing free rotation of the spool in the seconddirection.

In another embodiment a closure system or reel assembly may provideincremental loosening of lace tension by displacing axially orientedteeth from corresponding teeth that are fixedly coupled with thehousing. In such embodiments, the teeth that are fixedly coupled withthe housing may be arranged on a disc or other component that isattachable to the housing, or may be integrated into the housing. Theclosure system or reel assembly may also provide a full release or lacetension loosening mechanism. In such embodiments, the closure system mayinclude a housing having an interior region and a spool that ispositioned within the interior region of the housing and rotatablerelative thereto. A tension member may be coupled with the spool. Atensioning mechanism having a knob may be configured to effecttensioning of the tension member by winding the tension member aroundthe spool upon rotation of the knob. An incremental release componentmay be operationally coupled with the spool.

The incremental release component may have one or more axially orientedteeth that engage with corresponding teeth of a toothed disc that isattachable to the housing. The incremental release component may beconfigured to effect incremental tensioning of the tension member uponrotation of the knob in a first direction by engaging the axiallyoriented teeth. Engagement of the axially oriented teeth may allow thespool to rotate in a first direction while preventing rotation of thespool in a second direction. The incremental release component may alsobe configured to effect incremental loosening of the tension member'stension upon rotation of the knob in a second direction by disengagingthe axially oriented teeth. Disengagement of the axially oriented teethmay allow the spool to rotate in a second direction by an incrementalamount. The closure system may also include a full release mechanismthat is transitionable between an engaged state and a disengaged state.When the full release mechanism is in the engaged state, the tensionmember's tension may be incrementally tensioned or loosened upon saidrotation of the knob. When the full release mechanism is in thedisengaged state, the tension member's tension may be automaticallyloosened.

In some embodiments, the full release mechanism may be transitionablebetween the engaged state and the disengaged state upon operation of alever, button, or release component. In such embodiments, operation ofthe lever, button, or release component may move the spool axiallydownward within the housing's interior region and out of engagement withthe incremental release component. In other embodiments, the fullrelease mechanism may be transitionable between the engaged state andthe disengaged state upon the knob being moved axially upward relativeto the housing. In such embodiments, moving the knob axially upwardrelative to the housing may disengage the spool and the incrementalrelease component.

Referring now to FIGS. 12A-C, illustrated is an embodiment of amechanism that may be used with a tensioning device to hold or maintaina shoe, brace, or other apparel in an open configuration. For example,the mechanism may find particular usefulness in shoes where a userdesires to open opposing eyestays of the shoe and maintain the eyestaysin an open configuration until the shoe is fit about the user's foot.The mechanism of FIGS. 12A-C may be particularly useful for secondarywinding assemblies of tensioning devices that are used to quickly windup lace, such as a motorized tensioning device or a manual basedtensioning device that employs a spring (e.g., spiral torsion spring)that is configured to automatically rotate or wind the tensioningdevice's spool.

As shown in FIG. 12A, the mechanism 1200 includes a pawl 1220 or othermember that is configured to catch and mechanically locked within adetent 1222 or recess of a spool 1204, such as the spools shown in theembodiments herein. The spool 1204 is coupled with a constant forcespring 1202 via a spring component 1206. The constant force spring 1202is configured to rapidly wind the spool 1204 via the spring component1206. To prevent automatic winding of the spool 1204 via constant forcespring 1202, the pawl 1220 engages with the detent 1222 and locks ormaintains spool 1204 in position. This allows a first lace 1210 and/orsecond lace 1212 to remain relatively loose and/or un-tensioned, whichaides in donning of the shoe about a foot. FIG. 12A shows the pawl 1220being positioned in a rightward orientation relative to the spool 1204and further shows the pawl 1220 positioned within the, detent 1222 toprevent clockwise rotation of spool 1204 and thereby hold or maintainthe spool 1204 in position. The rotational force exerted on spool 1204via the constant force spring 1202 and the spring component 1206 is notsufficient to overcome the force imparted on the spool 1204 by the pawl1220. Stated differently, the pawl 1220 counteracts rotation of thespool 1204 and as such, the spool 1204 remains stationary while the pawl1220 is positioned in the rightward orientation.

After the shoe is donned and the user wishes to close and tighten thebrace or shoe, the tensioning device is actuated to move the pawl 1220into a disengaged position relative to the spool 1204 and the detent1222. Specifically, as shown in FIG. 12B, the knob 1208 of thetensioning device, or a motor component of a motorized tensioningdevice, may be engaged to rotate the spool 1204 clockwise. Therotational force of the knob 1208 or motor is sufficient to cause thepawl 1220 to buckle within the detent 1222 or otherwise move relativethereto. As shown in FIG. 12B, buckling or moving of the pawl 1220causes the pawl 1220 to shift or displace from the rightward orientationto a leftward orientation in which the pawl 1220 does not preventclockwise rotation of the spool 1204. Rather, in the leftwardorientation, the detent 1222 may cause the pawl 1220 to deflect as thespool 1204 is rotated in a tightening direction (e.g., clockwise).Movement of the pawl 1220 from the rightward orientation to the leftwardorientation allows the constant force spring 1202 to quickly wind thespool 1204 via the spring component 1206, which allows the first lace1210 and/or the second lace 1212 to be quickly wound around the spool1204. Further tensioning of the first lace 1210 and/or second lace 1212may be achieved via the knob 1208 or motor unit as described herein.

FIG. 12C illustrates the pawl 1220 in the leftward orientation relativeto the spool 1204. FIG. 12C also illustrates the pawl 1220 beingpositioned within one of the detents 1222 in the leftward orientation.Positioning of the pawl 1220 within one of the detents 1222 may aid inpreventing counter rotation of the spool 1204 (e.g., counterclockwiserotation of spool 1204). To unwind or loosen the first lace 1210 and/orthe second lace 1212, the reverse of the above process may be performed.Specifically, the knob 1208 may be actuated to cause the spool 1204 torotate in a loosening direction (e.g., counterclockwise), which causesthe pawl 1220 to buckle or displace from the leftward orientation to therightward orientation as shown in FIG. 12A. The first lace 1210 and/orthe second lace 1212 may then be loosened via the knob/motor 1208 or viapulling open the eyestays of the shoe. The pawl 1220 then functions tomaintain the shoe in an open configuration as described above.

Exemplary embodiments of constant force springs are further described inU.S. patent application Ser. No. 14/198,419, filed Mar. 5, 2014,entitled “Systems, Methods, and Devices for Automatic Closure of MedicalDevices,” and in U.S. patent application Ser. No. 14/228,075, filed Mar.27, 2014, entitled “Reel Based Closure System,” the entire disclosuresof which are incorporated by reference herein.

Having described several embodiments, it will be recognized by those ofskill in the art that various modifications, alternative constructions,and equivalents may be used without departing from the spirit of theinvention. Additionally, a number of well-known processes and elementshave not been described in order to avoid unnecessarily obscuring thepresent invention. Accordingly, the above description should not betaken as limiting the scope of the invention.

Where a range of values is provided, it is understood that eachintervening value, to the tenth of the unit of the lower limit unlessthe context clearly dictates otherwise, between the upper and lowerlimits of that range is also specifically disclosed. Each smaller rangebetween any stated value or intervening value in a stated range and anyother stated or intervening value in that stated range is encompassed.The upper and lower limits of these smaller ranges may independently beincluded or excluded in the range, and each range where either, neitheror both limits are included in the smaller ranges is also encompassedwithin the invention, subject to any specifically excluded limit in thestated range. Where the stated range includes one or both of the limits,ranges excluding either or both of those included limits are alsoincluded.

As used herein and in the appended claims, the singular forms “a”, “an”,and “the” include plural referents unless the context clearly dictatesotherwise. Thus, for example, reference to “a process” includes aplurality of such processes and reference to “the device” includesreference to one or more devices and equivalents thereof known to thoseskilled in the art, and so forth.

Also, the words “comprise,” “comprising,” “include,” “including,” and“includes” when used in this specification and in the following claimsare intended to specify the presence of stated features, integers,components, or steps, but they do not preclude the presence or additionof one or more other features, integers, components, steps, acts, orgroups.

1. A system for tightening an article comprising: a housing having aninterior region; a spool rotatably positioned within the interior regionof the housing, the spool having an annular channel formed therein; atension member that is coupled with the spool so that rotation of thespool in a tightening direction causes the tension member to wind aboutthe spool's annular channel and thereby tighten the article, and so thatrotation of the spool in a loosening direction causes the tension memberto unwind from the spool's annular channel and thereby loosen thearticle; a tensioning device that is operably coupled with the spool tocause the spool to rotate within the interior region of the housing inthe tightening direction; and a spool lock component that is positionedwithin the housing and that is transitionable between an engagedposition and a disengaged position, wherein: in the engaged position thespool lock component prevents rotation of the spool in the tighteningdirection; in the disengaged position rotation of the spool in thetightening direction is enabled: and the spool lock componenttransitions from the engaged position to the disengaged position uponactuation of the tensioning device.
 2. The system of claim 1, furthercomprising a secondary winding assembly that is operably coupled withthe spool and that is configured to rapidly rotate the spool in thetightening direction to rapidly wind the tension member about thespool's annular channel, wherein when the spool lock component is in theengaged position, the secondary winding assembly is prevented fromrapidly rotating the spool and when the spool lock component is in thedisengaged position, the secondary winding assembly is able to rapidlyrotate the spool.
 3. The system of claim 2, wherein the secondarywinding assembly comprises a spiral torsion spring.
 4. The system ofclaim 2, wherein the tensioning device is a knob that is configured foruser rotation and wherein the spool lock component transitions from theengaged position to the disengaged position upon user rotation of theknob in the tightening direction.
 5. The system of claim 2, wherein thetensioning device is a motorized device and wherein the spool lockcomponent transitions from the engaged position to the disengagedposition upon actuation of the motorized device to rotate the spool inthe tightening direction.
 6. The system of claim 1, wherein the spoollock component is a flexible pawl that engages with a tooth of the spoolin the engaged position and that flexes or buckles upon actuation of thetensioning device in order to transition from the engaged position tothe disengaged position.
 7. The system of claim 1, wherein the spoollock component is displaced in relation to the spool as the spool lockcomponent transitions from the engaged position to the disengagedposition.
 8. The system of claim 1, wherein the spool lock componenttransitions from the disengaged position to the engaged position inresponse to rotation of the spool in the loosening direction.
 9. Aclosure system for tightening an article comprising: a housing having aninterior region; a spool rotatably positioned within the interior regionof the housing; a tension member that is coupled with the spool so thatrotation of the spool in a tightening direction causes the tensionmember to wind about the spool and so that rotation of the spool in aloosening direction causes the tension member to unwind from the spool;a tensioning mechanism that is operable to rotate the spool within theinterior region of the housing; and a spool lock component that ispositioned within the interior region of the housing and that isoperable to prevents rotation of the spool in the tightening directionuntil the tensioning mechanism is actuated, afterwhich rotation of thespool is enable in the tightening direction.
 10. The closure system ofclaim 9, wherein the closure system further comprises a secondarywinding member that is operably coupled with the spool and that isconfigured to rapidly rotate the spool in the tightening direction torapidly wind the tension member about the spool, wherein the spool lockcomponent prevents the secondary winding member from rapidly rotatingthe spool until the tensioning mechanism is actuated, afterwhich thesecondary winding member is able to rapidly rotate the spool.
 11. Theclosure system of claim 10, wherein the secondary winding membercomprises a spiral torsion spring.
 12. The closure system of claim 10,wherein the tensioning mechanism is a knob that is configured for userrotation and wherein actuating the tensioning mechanism comprisesrotating the knob in the tightening direction.
 13. The closure system ofclaim 10, wherein the tensioning device is a motorized device andwherein actuating the tensioning mechanism comprises causing themotorized device to effect rotation of the spool in the tighteningdirection.
 14. The closure system of claim 9, wherein the spool lockcomponent engages with the spool in response to rotation of the spool inthe loosening direction, and wherein engagement of the spool lockcomponent with the spool prevents rotation of the spool in thetightening direction.
 15. A method for configuring a closure system fortightening an article, the method comprising: providing a housing havingan interior region; positioning a spool within the interior region ofthe housing so that the spool is rotatable relative to the housing;operably coupling a tensioning mechanism with the spool, the tensioningmechanism being operable to cause the spool to rotate within theinterior region of the housing; and positioning a spool lock componentwithin the interior region of the housing, the spool lock componentbeing operable to prevent rotation of the spool in the tighteningdirection until the tensioning mechanism is actuated, afterwhichrotation of the spool is enable in the tightening direction.
 16. Themethod of claim 15, further comprising coupling a secondary windingmember with the spool, the secondary winding member being configured torapidly rotate the spool in the tightening direction, wherein the spoollock component prevents the secondary winding member from rapidlyrotating the spool until the tensioning mechanism is actuated,afterwhich the secondary winding member is able to rapidly rotate thespool.
 17. The method of claim 16, wherein the secondary winding membercomprises a spiral torsion spring.
 18. The method of claim 16, whereinthe tensioning mechanism is a knob that is configured for user rotationand wherein actuating the tensioning mechanism comprises rotating theknob in the tightening direction.
 19. The method of claim 16, whereinthe tensioning device is a motorized device and wherein actuating thetensioning mechanism comprises causing the motorized device to effectrotation of the spool in the tightening direction.
 20. The method ofclaim 15, wherein the spool lock component engages with the spool inresponse to rotation of the spool in the loosening direction, andwherein engagement of the spool lock component with the spool preventsrotation of the spool in the tightening direction.